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US12023611B2 - Liquid carrier filtration - Google Patents

Liquid carrier filtration Download PDF

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Publication number
US12023611B2
US12023611B2 US17/254,898 US201817254898A US12023611B2 US 12023611 B2 US12023611 B2 US 12023611B2 US 201817254898 A US201817254898 A US 201817254898A US 12023611 B2 US12023611 B2 US 12023611B2
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US
United States
Prior art keywords
plates
liquid carrier
liquid
contaminant
reservoir
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
US17/254,898
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English (en)
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US20210291088A1 (en
Inventor
Doron Schlumm
Igor Chertov
Sergei Trifonov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Development Co LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Development Co LP filed Critical Hewlett Packard Development Co LP
Assigned to HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. reassignment HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHERTOV, Igor, SCHLUMM, DORON, TRIFONOV, Sergei
Publication of US20210291088A1 publication Critical patent/US20210291088A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/06—Filters making use of electricity or magnetism
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
    • G03G15/104—Preparing, mixing, transporting or dispensing developer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/06—Developers the developer being electrolytic
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium

Definitions

  • print agent is applied to a printable substrate via a roller, or multiple rollers.
  • the print agent may comprise a combination of a non-liquid material in a liquid carrier, such that a portion of the non-liquid material is transferred to the printable substrate and at least some of the liquid carrier can be removed from the apparatus.
  • the liquid carrier may remain contaminated with non-liquid material that has not been transferred onto the printable substrate, and with other material, such as particles (e.g. dust) from the printable substrate.
  • particles e.g. dust
  • FIG. 1 is a simplified illustration of an example of a perspective view of a filtration apparatus
  • FIG. 2 is a simplified illustration of a further example of a perspective view of a filtration apparatus
  • FIG. 3 is a simplified illustration of an exploded view of the print agent filtration apparatus of FIG. 2 ;
  • FIG. 4 is a flowchart of an example of a filtration method
  • FIG. 5 is a flowchart of a further example of a filtration method
  • FIG. 6 is a simplified schematic of an example of a print apparatus.
  • print agent such as ink
  • ink may be used which is formed of a combination of non-liquid material (e.g. solid or partially solid material) and a liquid carrier, such as imaging oil.
  • the print agent is stored in a reservoir and may be transferred using a binary ink developer (BID).
  • BID binary ink developer
  • Each BID transfers print agent of a particular colour, so an LEP printing system may include, for example, seven BIDs.
  • Some of the non-liquid part of the print agent from a BID is selectively transferred from a developer roller of the BID in a layer of substantially uniform thickness to an imaging plate of a photoconductive imaging plate, such as a photo imaging plate (PIP).
  • PIP photo imaging plate
  • the selective transfer of print agent may be achieved through the use of electrically-charged (or electrostically-charged) print agent.
  • the non-liquid component of the print agent may be electrically-charged (or electrostatically-charged) while the liquid carrier carries no electrical or electrostatic charge.
  • the entire imaging plate which may form part of or be located on a rotatable roller or drum, may be electrostatically charged, using a charging device, such as charge roller (e.g. a ceramic charge roller), which rotates relative to the imaging plate. Areas on the imaging plate representing an image to be printed may then be discharged, for example by forming a latent image on the imaging plate using a laser beam or other type of light.
  • the electrode 102 may comprise a negative electrode.
  • the filtration apparatus 100 further comprises a reservoir 110 having a wall 112 defined at least partially by the first surface 104 , the reservoir to house a volume of liquid carrier 106 .
  • the reservoir 110 may comprise a container into which the liquid carrier 106 may be input.
  • the reservoir 110 may, in some examples, include end walls (not shown in FIG. 1 ) to contain the liquid carrier 106 .
  • the electrode 102 may be sealed to other components which form end walls of the reservoir 110 .
  • a voltage of up to around 6 kiloVolts (kV) may be applied to the electrode 102 .
  • a voltage of between around 3.5 kiloVolts (kV) and around 4.5 kV may be applied to the electrode 102 .
  • a voltage of between around 4 kV and around 4.2 kV may be applied to the electrode 102 .
  • a voltage of around 4.1 kV may be applied to the electrode 102 .
  • electrically-charged or electrostatically-charged print agent may be used and, in such systems, electrically-charged non-liquid print agent contaminant may be present in a liquid carrier. Therefore, the used liquid carrier may contain electrically-charged non-liquid print agent contaminant that has not been transferred onto the printable substrate. The generated electric field will act on the electrically-charged contaminant, causing it to be attracted to the accumulation surface 116 of a plate, or of multiple plates, of the plurality of plates 114 . A particle or piece of non-liquid contaminant 108 may be caused to adhere to the accumulation surface 116 to which it is closest.
  • non-electrically-charged contaminant such as particles from the printable substrate (e.g. paper dust) may become electrostatically-charged as a result of the generated electric field.
  • any material that becomes electrostatically-charged is also attracted to the accumulation surfaces 116 of the plates 114 .
  • the liquid part (e.g. imaging oil) in the liquid carrier 106 is not electrically-charged, and does not become electrostatically-charged, it is not affected by the generated electric field.
  • the non-liquid contaminant 108 in the liquid carrier 106 accumulates on the accumulation surfaces 116 of the plates 114 while the liquid carrier remains in the reservoir 110 .
  • each plate of the plurality of plates 114 may have a diameter of between around 80 millimetres and around 200 millimetres. In other examples, the plates 114 may have a diameter of between around 100 millimetres and around 150 millimetres. In one example, the plates 114 may have a diameter of around 120 millimetres.
  • Each plate of the plurality of plates 114 may, in some examples, have a thickness of between around 1 millimetre and around 7 millimetres. In other examples, the plates 114 may have a thickness of between around 3 millimetres and around 5 millimetres. In one example, the plates 114 may have a diameter of around 4 millimetres.
  • the number of plates 114 to be included in the plurality of plates of the apparatus 100 may be determined based on the intended overall size of the filtration apparatus. The greater the number of plates, the greater the amount of liquid carrier 106 that can be filtered at a time. In one example, the filtration apparatus 100 may comprise around 31 plates while, in other examples, more or fewer plates may be included.
  • FIGS. 2 and 3 are simplified illustrations of a further example of a filtration apparatus 200 .
  • FIG. 2 is a perspective view of part of the filtration apparatus 200
  • FIG. 3 is an exploded view of the filtration apparatus 200 .
  • the plurality of plates 114 are formed as a plate assembly, with the plates mounted at their common axis 118 , for example on an axis or spindle.
  • the filtration apparatus 200 includes the electrode 102 having the first surface 104 , and the plurality of plates 114 , each plate having an accumulation surface 116 on each of its opposing sides.
  • the filtration apparatus 200 may further comprise inlet 202 to receive the liquid carrier 106 containing non-liquid contaminant into the reservoir 110 .
  • the inlet 202 provides a means by which the liquid carrier 106 (e.g. used and/or contaminated liquid carrier) can enter the reservoir 110 to be filtered.
  • the filtration apparatus 200 may further comprise an outlet 204 to allow filtered liquid carrier to flow out of the reservoir 110 .
  • multiple inlets 202 and/or multiple outlets 204 may be provided.
  • FIG. 2 shows an example of a particular arrangement of inlets 202 and outlets 204 .
  • the inlet 202 may comprise multiple apertures 202 a , 202 b positioned at regular intervals over the extent of the plurality of plates 114 (e.g. at regular intervals over the length of the plate assembly).
  • the inlet apertures 202 a , 202 b evenly (i.e. at regular intervals) over the length of the plate assembly (e.g. along the length of the axis 118 )
  • an even flow distribution of the liquid carrier 106 among the plates 114 can be achieved.
  • the filtration of the liquid carrier can be improved, and even optimised.
  • inlets 202 a , 202 b are provided, in other examples, a greater number of inlets may be provided, and these may be spaced evenly (e.g. positioned at regular intervals) along the length of the axis 118 .
  • the inlet 202 (or inlets 202 a , 202 b ) may be positioned below the plurality of plates 114 . In this way, liquid carrier 106 entering the filtration apparatus 100 , 200 is forced to rise up towards the plates 114 , and this may lead to a slower movement of the liquid carrier the plates, thereby reducing the likelihood that liquid carrier will remove (e.g. wash off) non-liquid contaminant that has accumulated to the accumulation surfaces 116 of the plates 114 .
  • liquid carrier 106 may accumulate in an inlet containment region 206 , before entering the reservoir 116 through an aperture 208 , or multiple apertures, formed through the wall 112 of the reservoir 110 .
  • the inlet(s) 202 and/or the aperture(s) 208 may include valves to prevent liquid carrier from leaving the reservoir in this way.
  • the aperture 208 is formed at the bottom of the reservoir 110 , such that liquid carrier 106 is able to rise up from the inlet containment region 206 , through the aperture, and into the reservoir.
  • multiple apertures 208 may be provided over the length of the reservoir 110 .
  • the flow of the liquid carrier is restricted, so that, once the liquid carrier enters the reservoir, it means mainly upwards to fill the reservoir from below, so as to prevent the flow of liquid carrier from displacing non-liquid contaminant that has adhered to the plates 114 .
  • FIG. 7 is a simplified schematic of a further example of a print apparatus 700 .
  • the print apparatus 700 may comprise a component or components of the print apparatus 600 discussed above.
  • the filtration component may further comprise a contaminant displacement member 212 to displace non-liquid contaminant 108 from the plurality of plates 114 .
  • the displacement member 212 may, for example, comprise a scraper or blade, and may, in some examples have a finger-like arrangement.
  • the print apparatus 700 may further comprise a collector 702 to receive filtered liquid carrier from the flow region.
  • the filtered liquid carrier i.e. the liquid carrier with the non-liquid contaminant having been removed

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Electrostatic Separation (AREA)
US17/254,898 2018-11-29 2018-11-29 Liquid carrier filtration Active US12023611B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2018/063112 WO2020112119A1 (fr) 2018-11-29 2018-11-29 Filtration de support liquide

Publications (2)

Publication Number Publication Date
US20210291088A1 US20210291088A1 (en) 2021-09-23
US12023611B2 true US12023611B2 (en) 2024-07-02

Family

ID=70854386

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/254,898 Active US12023611B2 (en) 2018-11-29 2018-11-29 Liquid carrier filtration

Country Status (4)

Country Link
US (1) US12023611B2 (fr)
EP (1) EP3841435B1 (fr)
CN (1) CN113056709A (fr)
WO (1) WO2020112119A1 (fr)

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440504A (en) 1944-08-16 1948-04-27 Permanente Metals Corp Apparatus for electrophoretic separation of solids from liquids
US3909383A (en) 1969-04-24 1975-09-30 Xerox Corp Cleaning process
US4799452A (en) 1987-07-23 1989-01-24 Precision Image Corporation Liquid toner recycling system and method
US5143630A (en) 1991-05-30 1992-09-01 Membrex, Inc. Rotary disc filtration device
JPH06145671A (ja) * 1992-06-18 1994-05-27 Sekiyu Sangyo Kasseika Center 重質油中の粒子凝集装置
CN1151134A (zh) 1994-05-26 1997-06-04 唐杰Pty有限公司 从载料媒体转移物质的方法和设备
JPH1074027A (ja) 1996-08-30 1998-03-17 Ricoh Co Ltd 液浄化装置及び該液浄化装置を備えた湿式画像形成装置
US5942095A (en) * 1996-10-07 1999-08-24 Phoenix Precision Graphics, Inc. Method of continuous purification of liquid toner in an electrostatic printing system
JP2000354789A (ja) * 1999-06-11 2000-12-26 Zeotekku Kenkyusho:Kk 液中不純物静電凝集吸着分離装置
JP2003066805A (ja) 2001-08-24 2003-03-05 Pfu Ltd オイルリサイクル装置
JP2003260315A (ja) 2002-03-13 2003-09-16 Pfu Ltd キャリア液濾過用電界フィルタ
JP2003270957A (ja) 2002-03-13 2003-09-25 Pfu Ltd キャリア液リサイクル装置
JP2005077896A (ja) 2003-09-02 2005-03-24 Pfu Ltd キャリア液リサイクル装置
WO2006068968A2 (fr) 2004-12-22 2006-06-29 M-I L.L.C. Procede et appareil de purification d'un fluide a base d'huile
WO2008032604A1 (fr) * 2006-09-12 2008-03-20 Zeotek Research Institute Ltd. procédé et appareil d'épuration de mazout
US20100225919A1 (en) 2009-03-05 2010-09-09 Henryk Birecki Determining Solid Concentration of an Ink
WO2011007820A1 (fr) * 2009-07-15 2011-01-20 国立大学法人名古屋工業大学 Procédé de récupération de particules et appareil de récupération de particules
US20120079955A1 (en) 2010-10-05 2012-04-05 Lam Quang P Printers, methods, and apparatus to filter imaging oil
EP2541336A1 (fr) 2010-02-24 2013-01-02 Mitsubishi Heavy Industries Printing & Packaging Machinery, Ltd. Dispositif de séparation de contenu solide pour toner liquide

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440504A (en) 1944-08-16 1948-04-27 Permanente Metals Corp Apparatus for electrophoretic separation of solids from liquids
US3909383A (en) 1969-04-24 1975-09-30 Xerox Corp Cleaning process
US4799452A (en) 1987-07-23 1989-01-24 Precision Image Corporation Liquid toner recycling system and method
US5143630A (en) 1991-05-30 1992-09-01 Membrex, Inc. Rotary disc filtration device
JP3217135B2 (ja) * 1992-06-18 2001-10-09 財団法人石油産業活性化センター １パス式の静電浄油システム
JPH06145671A (ja) * 1992-06-18 1994-05-27 Sekiyu Sangyo Kasseika Center 重質油中の粒子凝集装置
CN1151134A (zh) 1994-05-26 1997-06-04 唐杰Pty有限公司 从载料媒体转移物质的方法和设备
US6019455A (en) 1994-05-26 2000-02-01 Tonejet Corporation Pty. Ltd. Method of and apparatus for transferring material from a bulk medium
JPH1074027A (ja) 1996-08-30 1998-03-17 Ricoh Co Ltd 液浄化装置及び該液浄化装置を備えた湿式画像形成装置
US5942095A (en) * 1996-10-07 1999-08-24 Phoenix Precision Graphics, Inc. Method of continuous purification of liquid toner in an electrostatic printing system
JP2000354789A (ja) * 1999-06-11 2000-12-26 Zeotekku Kenkyusho:Kk 液中不純物静電凝集吸着分離装置
JP2003066805A (ja) 2001-08-24 2003-03-05 Pfu Ltd オイルリサイクル装置
JP2003260315A (ja) 2002-03-13 2003-09-16 Pfu Ltd キャリア液濾過用電界フィルタ
JP2003270957A (ja) 2002-03-13 2003-09-25 Pfu Ltd キャリア液リサイクル装置
JP2005077896A (ja) 2003-09-02 2005-03-24 Pfu Ltd キャリア液リサイクル装置
WO2006068968A2 (fr) 2004-12-22 2006-06-29 M-I L.L.C. Procede et appareil de purification d'un fluide a base d'huile
US7686933B2 (en) * 2004-12-22 2010-03-30 M-I L.L.C. Method and apparatus for purifying an oil-based fluid
WO2008032604A1 (fr) * 2006-09-12 2008-03-20 Zeotek Research Institute Ltd. procédé et appareil d'épuration de mazout
US20100225919A1 (en) 2009-03-05 2010-09-09 Henryk Birecki Determining Solid Concentration of an Ink
WO2011007820A1 (fr) * 2009-07-15 2011-01-20 国立大学法人名古屋工業大学 Procédé de récupération de particules et appareil de récupération de particules
EP2541336A1 (fr) 2010-02-24 2013-01-02 Mitsubishi Heavy Industries Printing & Packaging Machinery, Ltd. Dispositif de séparation de contenu solide pour toner liquide
US20120079955A1 (en) 2010-10-05 2012-04-05 Lam Quang P Printers, methods, and apparatus to filter imaging oil
US9016198B2 (en) * 2010-10-05 2015-04-28 Hewlett-Packard Development Company, L.P. Printers, methods, and apparatus to filter imaging oil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Definition of "reservoir"—Merriam-Webster, https://www.merriam-webster.com/dictionary/reservoir (Year: 2022). *

Also Published As

Publication number Publication date
WO2020112119A1 (fr) 2020-06-04
US20210291088A1 (en) 2021-09-23
CN113056709A (zh) 2021-06-29
EP3841435A4 (fr) 2022-03-30
EP3841435A1 (fr) 2021-06-30
EP3841435B1 (fr) 2023-12-27

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